# An Electric Dipole is Placed in an Electric Field Generated by a Point Charge. - Physics

MCQ

An electric dipole is placed in an electric field generated by a point charge.

#### Options

• The net electric force on the dipole must be zero.

•  The net electric force on the dipole may be zero.

•  The torque on the dipole due to the field must be zero.

• The torque on the dipole due to the field may be zero.

#### Solution

The torque on the dipole due to the field may be zero.
Torque acting on a dipole placed in an electric field,

$\tau = r \times F$
$= rF\sin\theta,$

where  θ is the angle between the force F and the arm of the couple.
So, for θ = 0 or pi ,the torque will be zero. Hence, the amount of torque acting on the dipole depends on the orientation of the dipole in the given electric field.

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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 7 Electric Field and Potential
MCQ | Q 6 | Page 120